WESTFIELD -- One person died and three were injured in a three-vehicle collision on Route 20 in Westfield shortly after 2:30 p.m. Wednesday, according to Westfield Police Lt. Jay Pitoniak.

The identities of the victims were unavailable late Wednesday night. Pitoniak said more information should be available once authorities contact the deceased person's family.

Police said the crash at the intersection of Route 20 (Springfield Road) and East Mountain Road was reported at 2:38 p.m., tying up traffic for much of the afternoon. Traffic was back to normal once the accident scene was cleared around 8 p.m. Wednesday.

Police said the person who was fatally injured was a passenger in one of the vehicles. The driver of that vehicle was taken to Noble Hospital in Westfield, while the other two drivers were transported to Baystate Medical Center in Springfield. Their conditions were not immediately known Wednesday night.

The crash occurred on Route 20 west and remains under investigation by Westfield and state police from the Collision Analysis and Reconstruction Section.